A study in the journal
Nature on the roots of violence among humans yielded an interesting byproduct: A list of mammals and the rate at which a species kills others of its own kind, which can happen due to anything from animals squabbling among themselves to infanticide when older group members try to take control.

Tops on that list was a shocker: meerkats! Yes, those cute creatures almost universally loved by humans are nature's top murderers of their own, with the study reporting that 19.4 percent of all meerkat deaths come at the hands of, well, other meerkats. Here, with a hat tip to The Independent, we take a look at the other mammals that fill out a grisly top 10.